Web-controller for presses.



No. 877,232. PATENTED JAN. 21, 1908.

' P. W. ROLLAND, JR.

WEB CONTROLLER FOR P'RESSES.

APPLICATION FILED OOT. 30.1907.

FREDERICK W. HOLLAND, JR, OF CHICAGO, ILLINOIS.

WEB-CONTROLLER FOR PRESSES..

Specification of Letters Patent.

Patented Jan. 21,1908.

Application filed October 30, 1907. Serial No. 399.877.

To all whom it may concern:

Be it known that I, FREDERICK W. ROL- LAND, Jr., a citizen of the UnitedStates,

residing at Chicago, in the county of Cook, and State of Illinois, haveinvented new and useful Improvements in Web-Controllers for Presses, ofwhich the following is a specification.

My present invention relates to improvements in devices for controllingthe unwinding movement of rolls of paperand other material which forms aweb, ,such as used in rinting presses of the web type, and it has or itsobjects to produce a controller of this character that is capable ofstarting the unwinding movement of the roll gradually and with a minimumresistance in order to avoid sna ping of the web when the press isstarted, an that so operates when the press is stopped, that theunwinding movement of the roll is arrested in a Way that will preventslack in the web.

Another object of the invention is to provide a device of this characterthat is capable of being adjusted at a relatively low tension during thestarting movement of the roll as when the press is being started, andafter the latter has attained full speed, an additional amount oftension may be applied that will retain the web in proper conditionduring the operation of the parts.-

To these and other ends, the invention consists in certain improvements,and combinations and arrangements of parts, all as will be hereinaftermore fully described, the novel features being pointed out particularlyin the claims at the end of the specification.

In the accompanying drawing-Figure 1 is a side elevation of a rollsupporting rack showing a paper controlling device constructed inaccordance with the present invention; Fig. 2 is a side elevation of theparts shown in Fig. 1; Fig. 3 is an end view of the roll supportingshaft showing the controlling device thereon, the springs beingpartially tensioned; Fig. 4 represents a section on the line 4'4, ofFig. 5; and Fig. 5 represents an axial section through the controller.

Similar arts are designated-by the same reference characters in theseveral views.

It will be understood, of course, that a controller constructed inaccordance with the present invention, is capable of being emplymg afresh roll of paper.

ployed generally in connection with rolls of paper and other materialfor the purpose of facilitating the starting of the unwinding movementthereof, and for arresting its unwinding movement so as to prevent undueslack .of the web when the feeding of the latter has been interrupted,and in the present instance, the controller is shown in connection witha printing press of the type that receives the paper in the form-of acontinuous web from a paper roll.

In the resent embodiment of the invention, 1 and 2 re resent theuprights of a rack that is arrange in line with the press and isprovided with brackets 3 and 4, that are adapted to receive the rollsupporting shaft 5', the latter being passed through the central openingof the roll as is usual, and is arranged 7 to turn with the roll, a pairof clamping collars 7 being shown in the present instance which engagethe opposite ends of the roll 8 and are secured in clamping positionupon the shaft by means of set screws or equivalent devices 9. The stripof paper leading from the roll, of course, constitutes the web whichleads to the feed rollers of the press and receives the impression fromthe type of the latter.

The controller shown in the'present embodiment of the invention,comprises a brake drum 10 which in the present instance is in the formof a pulley preferably provided with flanges 11 between which thedivided brake bands 12 and 13 engage, the brake bands being preferablysemi-circular in form and hinged at one side of the drum to a pin 14which is secured to a relatively fixed bracket 15, and the pressure andconsequent friction This screw is so constructed that it may be removedor otherwise adjusted to disconnect the brake bands and thereby permit apivotal movement of the latter that will enable the bands to be openedand thereby release the drum-when the shaft is removed from thesupporting brackets for the purpose 0 drum is loosely mounted on theshaft, that is to say, it is capable of rotatingrelat vely thereto, andit isheld in operative posltion by means of a pair of collars 19 and 20that are arranged on opposite sides of the web 21 f sulp- This bra e ofvthe drum, said screws or equivalent devices 22 and 23 serving to securethe two collars rigidly to the shaft so as to prevent relativelongitudinal or rotary movement between the parts. v

Between the brake drum and theshaft of the paper roll is interposed acompensatin med1umthat serves to effect the graduiil starting of theunwinding movement of the roll when the press is set in operation, andfor arresting the movement of the roll to prevent undue slack in the webwhen the press is stopped. In the present instance a pair of spiralsprings 24 and 25 are employed, these springs having their inner endssecured respectively to the collars 19 and 20 which rotate with theshaft, and their outer ends-are attached to the brake drum, the

direction of winding of the two springs being similar to and isdetermined according to the direction in which the roll rotates toeffect the unwinding of-the web, theobject being to set or tension thesprings when the roll is rotated in av direction of unwinding the web,

"provided rotation of the brake drum is resisted by the brake bands. Thes ring resistance thus interposed between t ebrake drum and the paperroll will act to retard or I resist the unwinding movement of the rollwith a yieldin force, but in order to enable the brake ban s to beadjusted so as to exert a considerable braking action on the roll,

suchfor instance as when the press is in full operation, it ispreferable to provide amore or less positive stop that serves to'form aposltlve drlving connection between the shaft and drum after the tensionof the s rings has exceeded a given limit, the'stop s own in the presentinstance comprising a radiallyprojecting arm 27 that is suitablyarranged tov rotate with the shaft, it forming sprrings, and after theshaft has been rotatedt ough a proximately a revolution relatively to te brake drum, this arm willcooperatewith the opposite sideof theprojection and thereby provide a more or less positive drivingconnection between the shaft and the drum. In order tov eliminate'shockbetween the arm 'ontheshaft and the co-' operating projection on thedrum, it is preferable to Iprovide one ofthe parts with a ing a stem 29that is guided to reciprocate vin the-"plane of movement of the arm andhas a head 3Q thereon which is adapted to vplug-age the projection 28 onthe drum, a

cal: spring 31 encircling the stem of the ock absorber, that shown inthe. present instance comprising a plunger havbrake drum if so desired,it being understood that this feature of the invention is notnecessarily limited to the. exact arrangement shown.

I In practice, the usual shaft 5 is inserted in the central openingthrough the paperroll before the latter has been lifted and placed uponthe rack, the-shaft. being removed from .the rack for this purpose afterthe brake bands'have been openedtodisengage the brake drum. The roll maythen beplaced upon the rack, the brake bands being adj usted upon theperiphery of the drum and the screw 16 setso that a reduced amount offriction is produced between the brake bands and the drum that willresist turning move ment of the latter. The strip of paper from the rollis, of course, introduced into the press and the feeding movementthereof is effected by the usual feed rolls when the press is started,the movement'of the web causes an unwinding movement of the roll, andthe shaft 5 turning with the latter causes the arm 27 to leave theprojection-28 and rotate relatively to the brake band, and'therefore thestarting of the roll may be accomplished with a minimum tension of theweb for the; reason that the springs permit a limited degree of rotationbetween the shaft of the roll and the brake band. After the roll hascompleted approximately a full revolution that usually is sufficient tostart the roll in full speed or accelerate the roll until'normal speedis attained, the arm 27 on the shaft reaches'a position opposite to theprojection on thebrake drum, the buffer serving to produce asubstantially positive driving connection between thearm and projectionso that during the normal operation of the roll, the brake bands may beadjusted-to any extent in order to obtainthe requisite or desiredbraking action. In stopping'the press -more or less suddenly, thetendency of the roll as usually mounted, is. to run ahead and therebyproduce an undue amount of slack in the web, but according to thepresentinvention, the momentthe tension on the web due to a diminutionin'the-speed of the press ceases, the springs 25 and 26 will immediatelyact, causing the arm 27 rotatable with the shaft to leave the projection28 on the brake drum and thereby overcome the inertia of the roll anddiminish its speed, and this retarding action continues until theunwinding movement of the roll ceases upon the stopping of the press.

A roll controll'ng device constructed in accordance with the presentinvention, isrelatively simple in construction so that it may be madecheaply and is not liable to get out of order and in practice, itprevents an undue amount of slack between the roll and the press orother machine into which the Web is fed, so that when the press isstarted, there is no liability of the web snapping.

What I claim is'- 1. A web controller for rolls of paper and the like,involvin a shaft for the roll, a brake drum rotata le'thereon, and adevice constantly connecting said shaft and drum during relativerotation thereof and acting to rewind the roll.

2. A controller of the character described, comprising ashaft for theroll, a tensioning device rotatable relatively thereto, a'springconnectin the shaft and tensioning device during re ative rotation ofthe latter and shaft, and positive driving devices forconnecting thetensionin dev1ceand shaft after the latter has rotate to tension thespring.

3. A controller of the character described embodying a shaft operableduring the unwinding of the roll, a tensioning device adapted to resistrotation of the shaft, and a compensating medium forming a constantyielding connection between the shaft and the tensioning device.

. 4. A controller of the character described winding of the roll, atensioning device for retarding rotation of the shaft, and a springconnecting the shaft and tensioning device and windable bya relativerotation of the shaft and tensionin' device, said spring normally actingto pro uce a relative rotation o the parts to rewind the roll.

6. A web controller for paper rolls com prising a shaft adapted torotate with the roll during its unwinding, a brake device, and

a s ring operatively connecting the latter an the shaft during relativerotation of said parts and operable during the unwinding of the roll torewind the latter.

7. A Web controller for aper rolls, comprising a shaft to receive t eroll and rota- 1 table therewith, a brake drum rotatably mounted on theshaft and having tensioning 9. A controller of the character describedembodying a shaft rotatable during the winding motion of the roll, abrake drum having tensioning devices arranged to cooperate therewith, acompensating medium yieldably connecting the shaft and drum, and meansfor forming a positive driving connection between the shaft and drumafter these parts have turned relatively through a predetermined angle.

10. A controller of the character described embodying a shaft operableduring the unwinding movement of the roll, a'brakedrum loosely mountedon the shaft, tensioning devices arranged to cooperate with the drum, aspring having its ends connected respectively to the shaft and drum, anda sto for limiting the relative rotation of the sha t and drum.

11. A controller of the character described embodying a shaft operableduring the unwinding of the roll, a drum revoluble on the shaft andhaving tensioning devices arranged to cooperate therewith, a s ringoperatively connecting the shaft and rum, and a sto for limiting therelative rotation of the sha t and drum embodying an arm on one of theparts and a cooperating projection on the other part.

12. A drum of the character described, comprising a shaft, a brake drumrotatable thereon and havingtensioning devices cooperating therewith, aspiral spring forming an operative connection between the shaft and drumand permitting relative rotation thereof, and a stop for limiting therotation of the shaft relatively to the drum comprising an arm on one ofthe arts, a projection on the other part, and a ufler for forming 'ayielding connection between the arm and embodying a shaft ada ,ted toserve as a su port for a paper roll, a rake drum rotatab e thereon, a siral spring forming an operative connection etween the drum and theshaft,

and a stop for limiting the relative rotation of the shaft and drum.

14. A controller of the character described, comprising a shaft, a brakedrum having a &

web journaled on the shaft, a pair of collars fixed to the shaltandcooperating with opposite sides of theweb, a palr of spiral springsoused Within the drum and having their 5 ends connectedrespectively tothe latter and the collars and both operating to turn the shaft in agiven direction relatively to'the I drum, and astop arranged to form apositive driving connection between theshaft and drum and to permit alimited degree of rota- 10 tion thereof.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

FREDERICK w. ROLLAND, JR. Witnesses:

FREDERICK J. SPEOHT, LE ROY T. PALMER.

